Rotary knife



FIG. 1 is a top view of a rotary knife embodying my invention;

FIG. 2 is a side view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top perspective view thereof; and,

FIG. 5 is a bottom perspective view thereof. 

CLAIM The ornamental design for a rotary knife, as shown and described. 